Home / 1,388,451.40-2,081,310.58-811,342.24

Finding the Fourth Proportional to 1,388,451.40, 2,081,310.58 and 811,342.24

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Solution

The fourth proportional to 1,388,451.40, 2,081,310.58 and 811,342.24 is: 1,216,214.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,451.40 : 2,081,310.58 = 811,342.24 : x
  2. Step 2: Convert to fraction form
    1,388,451.40/2,081,310.58 = 811,342.24/x
  3. Step 3: Cross multiply
    1,388,451.40x = 2,081,310.58 × 811,342.24
  4. Step 4: Simplify right side
    1,388,451.40x = 1,688,655,188,112.90
  5. Step 5: Solve for x
    x = 1,688,655,188,112.90/1,388,451.40
  6. Step 6: Final answer
    x = 1,216,214.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.